Why aircraft use rivets and cars use welds

Planes use rivets for their strength under stress, while cars use welding due to material differences and manufacturing processes. Aircraft construction favors rivets because aluminum, a common aircraft material, welds poorly and requires high heat. Steel, used in cars, welds more easily and is more tolerant of heat. Welding is also faster and more suited to automated car production, and rivets can add weight. Visible rivets would also detract from a car's aesthetic.